Don’t use invites to gain access to a private tracker. If the person who invited you gets banned you will get banned. Go through official interview process for MAM, OPS, or RED. That will get you in and you can jump to other trackers from there.

It seems you aren’t aware of what private trackers exist. If you install jackett you can filter torrent sites by private or public and get a nice list that way.

r (slash) invites

You might have been able to get free invites by posting your email in IRC about fifteen years ago, but nobody does that now. Now you need an interview or a profile from other trackers along with your stats.

here a free semi private tracker (always open tho just need a code) for 0day release

milkie dot cc (invite code: BestCowsHere)

Don’t bother, none of them are worth it, they require you to always be active and frequent their site, they practically force you to donate or be banned, their torrents are basically identical to what you’d find on all public torrent sites, their giveaways are fake as fuck, you can’t use scripts to automatically grab from the site because they’ll ban you for not actively browsing the site. You’re literally better off paying Netflix and friends than dealing with private trackers.